如何将json字符串传递给webmethod c＃ASP.NET

问题描述

我试图对javascript对象进行字符串化，然后将该字符串作为参数传递给Code Behind中的WebMethod。我无法让它工作，因为我得到500的内部服务器错误，堆栈跟踪说参数缺少值。

Im trying to stringify a javascript object and then pass the string as a parameter to a WebMethod in Code Behind. I can't get it to work as I get a Internal Server Error of 500 and the stacktrace says that value is missing for parameter.

这是javascript代码：

Here is the javascript code:

var jSon = JSON.stringify(javascriptObject);
// "{"Foretagsnamn":"Avector","BGFarg":"000000","TextColor":"fafafa","FooterFarg":"ffffff","FooterColor":"000000","FooterLinkColor":"050505","FeaturedBorderColor":"","HoverFarg":"12ebeb","RutFarg":"0d0d0d","SelectedRutFarg":"","RutColor":"FFFFFF","LankColor":"","DelaMedSig":"1","PersonalSida":"0","StartpageTitle":"","StartpageDescription":"","GoogleMaps":"<iframe width=\"425\" height=\"350\" frameborder=\"0\" scrolling=\"no\" marginheight=\"0\" marginwidth=\"0\" src=\"https://maps.google.se/maps?f=q&amp;source=embed&amp;hl=sv&amp;geocode=&amp;q=Avector AB&amp;aq=&amp;sll=56.225986,12.870827&amp;sspn=0.076248,0.154324&amp;ie=UTF8&amp;hq=Avector AB&amp;hnear=&amp;t=m&amp;cid=645910733081021950&amp;iwloc=A&amp;ll=56.224594,12.859229&amp;spn=0,0&amp;output=embed\"></iframe><br /><small><a href=\"https://maps.google.se/maps?f=q&amp;source=embed&amp;hl=sv&amp;geocode=&amp;q=Avector AB&amp;aq=&amp;sll=56.225986,12.870827&amp;sspn=0.076248,0.154324&amp;ie=UTF8&amp;hq=Avector AB&amp;hnear=&amp;t=m&amp;cid=645910733081021950&amp;iwloc=A&amp;ll=56.224594,12.859229&amp;spn=0,0\" style=\"text-align:left\">Visa större karta</a></small>","HittaKartaUrl":"http://www.hitta.se/avector ab/ängelholm/hxTP-4v1HG?vad=Avector AB","EniroKartaUrl":"http://kartor.eniro.se/m/aKkhi","Ikoner":"2","Email":"[email protected]","AdressSida":"1","shadowColor":"ffffff","lineColor":"2b292b","MenuHoverIcon":"Välj bild från server","fontFamily":"Verdana","supportText":"Support Avector","captcha":true,"metaKeywords":"","ShowSupportInFooter":true}"

$.ajax({
    type: "POST",
    url: "Post/Installningar.aspx/Updatera",
    data: jSon,
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (result) {

        var resultAsString = result.d;
        //_this.parent().siblings('.SavedStatus').html(resultAsString);

        if (resultAsString == "1") { // Gick bra att spara.
           alert("Uppgifterna är sparade.");
           document.location = document.location;
        }
        else {
           $('#StatusText').html("Gick inte att spara uppgifterna.");
        }


    },
    error: function (xhr, ajaxOptions, thrownError) {

    }
});

这里是webmethod：

And here Is the webmethod:

[WebMethod]
public static string Updatera(string jSon)
{

感觉就像我在谷歌和SO搜索时发现的所有内容都已经尝试过了。

It feels like I've tried everything that I've found when searching by google and here on SO.

I我们也尝试过很多人提到的指南：

I've also tried this guide that many refer to: http://encosia.com/using-jquery-to-directly-call-aspnet-ajax-page-methods/

任何想法？

推荐答案

首先你需要使用

var jSon = JSON.stringify（{obj：javascriptObject}）;

而不是

var jSon = JSON.stringify（javascriptObject）;

然后你的webmethod就像

Then you webmethod would be like

[WebMethod]
public static string Updatera(aData obj)
{
  // logic code
}

现在这里aData是你的类，如下所示

Now here aData is your class something like below

public class aData {
        public string Foretagsnamn  {get;set;}
         public string BGFarg  {get;set;}
         public string TextColor  {get;set;}
         public string FooterFarg  {get;set;}
         public string Email  {get;set;}
       }

---

所以你的最终代码看起来像

---

So your final code look like

jQuery：

 var jSon = JSON.stringify({obj:javascriptObject});
            $.ajax({
                type: "POST",
                url: "Post/Installningar.aspx/Updatera",
                data: jsonData,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess,
                error: OnErrorCall
            });

            function OnSuccess(response){

            }

            function OnErrorCall(){

            }

代码背后：

 public class aData {
    public string Foretagsnamn  {get;set;}
    public string BGFarg  {get;set;}
    public string TextColor  {get;set;}
    public string FooterFarg  {get;set;}
    public string Email  {get;set;}
}


[WebMethod]
public static string Updatera(aData obj)
{
   // logic code
}

请检查

Do check jQuery Ajax JSON Example in Asp.net

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